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.-/ .. r.•''.•4*i.•:..- ..'. •.f. ..:. , ..... :24. '.. • .49*4# ir & , 422;: t. b·-·: ' .. M ---f f..'-S./ ... - ».1, --\....=- 1 ie=.-= . : :*»4//-&7 --i 1--• - 1 41/' 1.7,)./I· .. * ./ ...: .\ 1 \.. .4*, l. --. - .... . -L.- I . iI . ....'.- h:.3 i.:S .4. - Newly poured plaster roadbed before smoothing and shaping shoulders. bubbles and to assure an even texture. (There is a tendency to trap air bubbles because the mixture is so light.) The plaster was allowed to set for a week. Then a Stanley Superform plane (or it could be an old jack plane) was used to smooth and shape the surface of the roadbed. (Curves should be carefully banked and contoured, keeping in mind that a bit of extra work in smoothing the roadbed will assure better track.) When t.·:.....,2.: the smoothing was complete, the top of the roadbed was given a good coat of sizing to seal the plaster. , i When joining sections of roadbed, a 147 r mixture of plaster having the consistency of thin cream was made to saturate the - _ * ":.:" old end to which a new section was to be joined. A tie-laying jig, similar to that described by Gordon Odegard in MR for June 1956, was used so individual ties could be laid quickly. In this jig ties are simply dropped into slots and a piece of masking tape is pressed down on top of the ties. The ties can then be picked up in a string and moved to location. A pencil line was drawn along one edge of the track side. Then the entire roadbed was given a coat of white vinyl glue before pressing the string of ties into place. Before the glue dried, ballast was sprinkled over the roadbed. After the glue was set any unattached sand was lifted with an extension hose on a vacuum cleaner. The rails were laid on the ties, using Pliobond cement. Walther's Goo would probably work about the same. The ties were marked for rail location and then the marks were touched with cement. The underside of the rail was then coated with cement and allowed to dry. Here Karl used a straight stick laid along the ties as a guide and gently lowered the rail in place. Once the two cemented September 1962 Roadbed with ties. Finished roadbed with ties and rails is shown below. surfaces touched they took hold, so it [Others have allowed the cement to was important that the rail be dropped the cement can be softened to join the rail very carefully. a moderate-temperature soldering iron, to the tie after the rail has been adjusted into place. We think many will find this dry even longer, until the two surfaces do method easier-but don't use too hot not immediately join. Then, by using an iron and burn the cement.-Ed.] -7= 1'!r •e...( ,-... •-2-:1 TE:... 11*. i • -111•'; 1 ' -•-• 1 I ....*/-2 :*2*Ti,Lirt'tlilli : 1, •49'"5"1' t 1/'ll - , I -:In:61 I ....... ... '... ·. .. . I i.. 1· i I:,U)3• - 2- 51 . i.-. 2 . ' rm *4 *femAN.4 : ='...:./..'..../.*li/"/ I **.PHOBULE,91 : CAC •.3•Jililimieliid . ....52-4:4124.,...3..2:1'Al #24.1 .... !.. -.. 4 4...4'»'4. . tz . .1 ' -I 12 4=r- ....r:<:... I. .-.......' .....=- -I . .=....--2 --$ & . --"----' ./ :i .. + 4 ..n= ...- ........I -... .. -,241al,fs'•.-'.T'-I ... 4'0 1 .-1.: '.I: &. . ....."* - : 0.- Let. /:1 - \,\'.- ht:.I . . --., ../- I. ./ ' \...... : ./ ...... The roadbed was poured in sections short enough to be worked. Wood block was used as a dam.. 41